ZHCSNU8A
january 2018 – may 2021
BQ25123
PRODUCTION DATA
1
1
特性
2
应用
3
说明
4
Revision History
5
Description (continued)
6
Device Comparison Table
7
Pin Configuration and Functions
8
Specifications
8.1
Absolute Maximum Ratings
8.2
ESD Ratings
8.3
Recommended Operating Conditions
8.4
Thermal Information
8.5
Electrical Characteristics
8.6
Timing Requirements
8.7
Typical Characteristics
9
Detailed Description
9.1
Overview
9.2
Functional Block Diagram
9.3
Feature Description
9.3.1
Ship Mode
9.3.1.1
Ship Mode Entry and Exit
9.3.2
High Impedance Mode
9.3.3
Active Battery Only Connected
9.3.4
Voltage Based Battery Monitor
9.3.5
Sleep Mode
9.3.6
Input Voltage Based Dynamic Power Management (VIN(DPM))
9.3.7
Input Overvoltage Protection and Undervoltage Status Indication
9.3.8
Battery Charging Process and Charge Profile
9.3.9
Dynamic Power Path Management Mode
9.3.10
Battery Supplement Mode
9.3.11
Default Mode
9.3.12
Termination and Pre-Charge Current Programming by External Components (IPRETERM)
9.3.13
Input Current Limit Programming by External Components (ILIM)
9.3.14
Charge Current Programming by External Components (ISET)
9.3.15
Safety Timer and Watchdog Timer
9.3.16
External NTC Monitoring (TS)
9.3.17
Thermal Protection
9.3.18
Typical Application Power Dissipation
9.3.19
Status Indicators ( PG and INT)
9.3.20
Chip Disable ( CD)
9.3.21
Buck (PWM) Output
9.3.22
Load Switch / LDO Output and Control
9.3.23
Manual Reset Timer and Reset Output ( MR and RESET)
9.4
Device Functional Modes
9.5
Programming
9.5.1
Serial Interface Description
9.5.2
F/S Mode Protocol
9.6
Register Maps
9.6.1
Status and Ship Mode Control Register
9.6.2
Faults and Faults Mask Register
9.6.3
TS Control and Faults Masks Register
9.6.4
Fast Charge Control Register
9.6.5
Termination/Pre-Charge and I2C Address Register
9.6.6
Battery Voltage Control Register
9.6.7
SYS VOUT Control Register
9.6.8
Load Switch and LDO Control Register
9.6.9
Push-Button Control Register
9.6.10
ILIM and Battery UVLO Control Register
9.6.11
Voltage Based Battery Monitor Register
9.6.12
VIN_DPM and Timers Register
10
Application and Implementation
10.1
Application Information
10.2
Typical Application
10.2.1
Design Requirements
10.2.2
Detailed Design Procedure
10.2.2.1
Default Settings
10.2.2.2
Choose the Correct Inductance and Capacitance
10.2.2.3
Calculations
10.2.2.3.1
Program the Fast Charge Current (ISET)
10.2.2.3.2
Program the Input Current Limit (ILIM)
10.2.2.3.3
Program the Pre-Charge/Termination Threshold (IPRETERM)
10.2.2.3.4
TS Resistors (TS)
10.2.3
Application Curves
10.2.3.1
Charger Curves
10.2.3.2
SYS Output Curves
10.2.3.3
Load Switch and LDO Curves
10.2.3.4
LS/LDO Output Curves
10.2.3.5
Timing Waveforms Curves
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
第三方产品免责声明
12.2
接收文档更新通知
12.3
支持资源
12.4
Trademarks
12.5
静电放电警告
12.6
术语表
13
Mechanical, Packaging, and Orderable Information
封装选项
机械数据 (封装 | 引脚)
YFP|25
MXBG084M
散热焊盘机械数据 (封装 | 引脚)
订购信息
zhcsnu8a_oa
zhcsnu8a_pm
1
特性
可延长两次充电之间的系统运行时间
可配置 300mA 降压稳压器
启用降压转换器时的 Iq 典型值为 700nA(空载)
可配置负载开关或 100mA LDO 输出
充电电流高达 300mA,可实现快速充电
电池稳压精度为 0.5%(可配置电压范围为 3.6V 至 4.65V,阶跃为 10mV)
可配置的终端电流低至
500µA
基于电压的简单电池监控器
高度集成的小尺寸解决方案
采用 2.5mm x 2.5mm WCSP 封装和 6 个外部元件,可更大程度地减小解决方案尺寸
通过可调节计时器实现按钮唤醒和复位
电源路径管理,用于系统供电和电池充电
电源路径管理功能可实现低于 50nA 的运输模式电池静态电流,从而更大限度延长货架期
电池充电器在 3.4V – 5.5V
IN
(5.5V OVP/20V 容差)范围内正常工作
用于输入电流限制、充电电流、终止电流和状态输出的专用引脚
I
2
C 通信控制
充电电压和电流
终止阈值
输入电流限制
VINDPM 阈值
计时器选项
负载开关控制
故障中断和状态控制
系统输出电压调节
LDO 输出电压调节